High · 7.5 CVE-2026-66273 EUVD-2026-53055GHSA-wr2r-m36x-734x

Apache Qpid Proton-J: Type size/count handling can lead to excessive allocation pre-authentication

Published Aug 5, 2026 · Updated Aug 6, 2026 · Assigned by apache

Description

A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service.

This issue affects Apache Qpid Proton-J: through 0.34.1.

Users are recommended to upgrade to version 0.35.0, which fixes the issue.

Vendor	Product	Affected	Fixed
Apache Software Foundation	Apache Qpid Proton-J	≤ 0.34.1	—